Review #137927 about “v4l2loopback”
Author: Ben
Webcam: v4l2loopback
Rating: Excellent (5 out of 5)
Date:
Advantages of the webcam:
Share screen or apps from GNU/Linux even if a website doesn't have that functionality.
Disadvantages of the webcam:
Requires using the commandline to setup. One command to install the needed software: apt install v4l2loopback-dkms. One command to make sure the kernel module is loaded (may not be necessary): modprobe v4l2loopback And one very long command to convert the image on your screen into data for the fake video camera: ffmpeg -probesize 100M -framerate 5 -f x11grab -video_size 1280x720 -i :0.0+0,0 -vcodec rawvideo -pix_fmt yuv420p -f v4l2 /dev/video2 (Your fake camera may show up at /dev/video1 or /dev/video0 depending upon how many real cameras you have).
Author’s comment:
May not work with Chromium based browsers without trickery.
Share screen or apps from GNU/Linux even if a website doesn't have that functionality.
Disadvantages of the webcam:
Requires using the commandline to setup. One command to install the needed software: apt install v4l2loopback-dkms. One command to make sure the kernel module is loaded (may not be necessary): modprobe v4l2loopback And one very long command to convert the image on your screen into data for the fake video camera: ffmpeg -probesize 100M -framerate 5 -f x11grab -video_size 1280x720 -i :0.0+0,0 -vcodec rawvideo -pix_fmt yuv420p -f v4l2 /dev/video2 (Your fake camera may show up at /dev/video1 or /dev/video0 depending upon how many real cameras you have).
Author’s comment:
May not work with Chromium based browsers without trickery.
Webcam Information
| Webcam Name: | Dummy video device (0x0000) |
|---|---|
| Type of Webcam: | Integrated |
| Quality Rank: | #98377 |
| Quality Rating: | 42 |
| Built-in Microphone: | — |
| Built-in Speaker: | — |
| Frame rate: | 5 FPS |
| Stream Type: | Video |
| Image Mode: | RGB Color |
| Webcam MegaPixels: | 0.92 MP |
| Webcam Resolution: | 1280×720 |
| Video Standard: | HD |
| Aspect Ratio: | 1.78 |
| PNG File Size: | 277.65 KB |
| JPEG File Size: | 599.77 KB |
| Bitrate: | 2.93 MB/s |
| Number of Colors: | 11584 |
| Average RGB Color: | |
| Lightness: | 64.9% |
| Luminosity: | 64.85% |
| Brightness: | 64.97% |
| Hue: | 206° |
| Saturation: | 3.91% |
Device Information
| Device Name | Loopback device to provide a fake webcam |
|---|---|
| Device Type | Laptop |
| Operating System | Linux |
| Browser | Firefox 102.0 |
| Screen Resolution | 1920×1080 |
| Color Depth | 24-bit |
| Screen Orientation | landscape-primary |